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Now showing items 151-160 of 229
Aufsatz
Unterstützung digitaler Bildungsprozesse durch interaktive gamifizierte Lernvideos – Wie innovative Lernvideos Motivation und Lernerfolg steigern können
(2021-10-11)
Digitales Lernen ist ein zentraler Bestandteil der heutigen Bildungslandschaft geworden. Insbesondere Lernvideos haben in den letzten Jahren deutlich an Popularität gewonnen und Plattformen wie YouTube sind heute ein fester Bestandteil von Lernprozessen. Bildungseinrichtungen haben diese Entwicklung erkannt und Lernvideos in ihre Lernsysteme integriert. Allerdings sind die heutigen Lernvideos oft nicht sehr ansprechend, weil es an Gestaltungswissen mangelt, wie Interaktionen und gamifizierte Elemente die Motivation ...
Aufsatz
Qualifizierung der Qualifizierenden
(2021-08-24)
Die wachsende Aufmerksamkeit für die Lebensphase Kindheit fordert die beruflichen Qualifizierungsformate wie die entsprechenden akademischen Studienprogramme. Die Bewältigung des diagnostizierten Fachkräftebedarfs und die damit eng verbundene Herausforderung der weiteren Professionalisierung sind unterdessen nach wie vor ungelöst. Vor diesem Hintergrund werden in dem Beitrag Wandlungsprozesse sozialpädagogischer Qualifizierungsformate skizziert und an bildungsorientierte Erwartungen erinnert, die eine Ausdifferenzierung ...
Aufsatz
Team Regulatory Focus and its Role for Idea Generation, Idea Implementation, and Innovative Performance: A Dynamic Perspective
(2021-05-27)
In an experimental study, we explored the relationships between team regulatory focus and temporal patterns of innovative activities as well as innovative performance. We manipulated regulatory focus in 44 student teams and assessed idea generation and implementation activities over time based on video data. External raters assessed innovative performance. Latent growth curve models revealed that higher team promotion focus increased idea generation at the beginning of an innovative project but decreased this activity ...
Aufsatz
Resolving the base of the pyramid inclusion paradox through supplier development
(2021-05-16)
Resulting from divergent business environments between actors, the integration of the base of the pyramid (BoP) into formal supply chain (SC) structures is often hampered by institutional voids, which can result in the emergence of paradoxical situations. This paper analyzes the potential of supplier development (SD) for addressing the BoP inclusion paradox. The study develops a framework based on the assumption that SD enables the development of capabilities and supplier performance, which is especially relevant ...
Aufsatz
Laser Powder Bed Fusion Processing of Fe-Mn-Al-Ni Shape Memory Alloy—On the Effect of Elevated Platform Temperatures
(2021-01-20)
In order to overcome constraints related to crack formation during additive processing (laser powder bed fusion, L-BPF) of Fe-Mn-Al-Ni, the potential of high-temperature L-PBF processing was investigated in the present study. The effect of the process parameters on crack formation, grain structure, and phase distribution in the as-built condition, as well as in the course of cyclic heat treatment was examined by microstructural analysis. Optimized processing parameters were applied to fabricate cylindrical samples ...
Aufsatz
Nonlocal damage modelling for finite element simulations of ductile steel sheets under multiaxial loading
(2021-12-14)
The finite element simulation of forming processes or vehicle crash scenarios involves multiaxial loading conditions in general. Thereby, damage and failure in ductile steel sheets is triggered by void growth under hydrostatic tensile loading or by void elongation within a narrow band under shear dominated loading. These different damage mechanisms are considered by a stress state dependent continuum damage model. The damage initiation and failure are represented by a critical and a failure strain. Both are HOSFORD-COULOMB ...
Aufsatz
Potentials and Limitations of WorldView-3 Data for the Detection of Invasive Lupinus polyphyllus Lindl. in Semi-Natural Grasslands
(2021-10-28)
Semi-natural grasslands contribute highly to biodiversity and other ecosystem services, but they are at risk by the spread of invasive plant species, which alter their habitat structure. Large area grassland monitoring can be a powerful tool to manage invaded ecosystems. Therefore, WorldView-3 multispectral sensor data was utilized to train multiple machine learning algorithms in an automatic machine learning workflow called ‘H2O AutoML’ to detect L. polyphyllus in a nature protection grassland ecosystem. Different ...
Aufsatz
Exploring Chinese Consumers’ Online Purchase Intentions toward Certified Food Products during the COVID-19 Pandemic
(2021-11-08)
The outbreak of COVID-19 has significantly increased consumers’ demands for online groceries, as well as healthy, safe, and better-quality food products. In China, certified food products are commonly perceived as safe and good-quality products. Therefore, this study investigated potential factors that influenced Chinese consumers’ online shopping intentions toward certified food during the COVID-19 crisis. An integrated model was proposed by combining the technology acceptance model (TAM) and the theory of planned ...
Aufsatz
Seasonal effects in the long-term correction of short-term wind measurements using reanalysis data
(2021-11-21)
Measure–correlate–predict (MCP) approaches are often used to correct wind measurements to the long-term wind conditions on-site. This paper investigates systematic errors in MCP-based long-term corrections which occur if the measurement on-site covers only a few months (seasonal biases). In this context, two common linear MCP methods are tested and compared with regard to accuracy in mean, variance, and turbine energy production – namely, variance ratio (VR) and linear regression with residuals (LR). Wind measurement ...
Aufsatz
New species and a new record of Phylloporia from Benin
(2021-04-23)
Species of the wood-decay genus Phylloporia (Hymenochaetaceae, Hymenochaetales, Basidiomycota) are widely distributed in the tropics. Phylloporia species are, however, morphologically and ecologically diverse, which makes morphology-based species identification challenging. In this study, we re-examined species of Phylloporia reported from Benin (West Africa). Using an integrative approach combining morphology, ecology, and phylogenetic analyses, we describe Phylloporia beninensis sp. nov. and report Phylloporia ...